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    <title>Document</title>
    <script>
        // 1.toString() 将数组转换为字符串
        var arr = [1, 2, 3];
        console.log(arr.toString()); //1,2,3
        // 2.join('分隔符')
        var arr1 = ['green', 'blue', 'pink'];
        console.log(arr1.join('&'));
    </script>
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